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I find that if there is an oil reservoir (compressor, etc) attached to the piping being evacuated, it takes so much longer and the ultimate vacuum attainable is not as high. This is more true if the...

I worked on a cooler in the criminology department at a local university. The police were using it to hold some of the feet that kept washing up on the coastline. Still creeps me out even though they...

Realizing that the pressures aren't what matter was the biggest revelation I made in my apprenticeship. The saturated temperatures and their relationship to the actual temperatures are what is really...